4-9a^2=

Solution for 4-9a^2= equation:

Simplifying
4 + -9a2 = 0

Solving
4 + -9a2 = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + -9a2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -9a2 = 0 + -4
-9a2 = 0 + -4

Combine like terms: 0 + -4 = -4
-9a2 = -4

Divide each side by '-9'.
a2 = 0.4444444444

Simplifying
a2 = 0.4444444444

Take the square root of each side:
a = {-0.666666667, 0.666666667}